Aw, you are so lucky you get to watch that! Please try to get a video!

I remeber a few years ago we had a Robin nesting in the tree in the front yard and the little ones were just a few days old and a large bird (hawk, or eagle or something) killed them It sounds silly, but there was something about the Robins song that sounded so deppressed and down, it just waited around the nest for days, it was so horrible I never really realized to what extent these birds care for their little ones.